Firestop Penetration Calculator

Calculate annular space, sealant volume, and packing depth for through-penetration firestop systems.

Opening diameter (in)

Penetrant diameter (in)

Wall/floor thickness (in)

Required fire rating (hrs)

Number of penetrants

Tab to move between fields

Annular space (sq in)

25.13

Sealant volume (fl oz)91.9

Fill ratio (%)11%

Mineral wool depth (in)5

Material cost ($)$46.3

Total installed cost ($)$70.3

How to Use This Calculator

Enter Opening diameter (in), Penetrant diameter (in), and Wall/floor thickness (in).
Set Required fire rating (hrs) and Number of penetrants.
Review the Annular space (sq in) result.
Use Sealant volume (fl oz) and Fill ratio (%) (%) to inform your decision.

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